Your sister knows you want her... so she's going to cosplay one of your favorite characters for you. She knows its going to tempty you, and when she asks you to help zip her up... she knows you want to do the opposite. That's ok, she's kind of turn on by it, in fact, she's going to talk a little dirty to you. Then when you get nice and hard, she's going to talk very dirty... and strip out of her naughty cosplay. She's going to show you every inch of her body while masturbating with you. She wants to cum with her big brother... You can do that can't you? Cum with me...